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Optimize sprintf -> siprintf if there are no floating point arguments

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and siprintf is available on the target.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126937 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Osborne
2011-03-03 14:09:28 +00:00
parent 12785e87e8
commit 419454ad37
4 changed files with 56 additions and 10 deletions
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21
test/Transforms/SimplifyLibCalls/iprintf.ll
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@@ -26,4 +26,25 @@ entry:
ret void
}
; Verify sprintf with no floating point arguments is transformed to siprintf
define i32 @f2(i8* %p, i32 %x) nounwind {
entry:
; CHECK: define i32 @f2
; CHECK: @siprintf
; CHECK: }
%0 = tail call i32 (i8*, i8*, ...)* @sprintf(i8 *%p, i8* getelementptr ([4 x i8]* @.str1, i32 0, i32 0), i32 %x)
ret i32 %0
}
; Verify we don't turn this into an siprintf call
define i32 @f3(i8* %p, double %x) nounwind {
entry:
; CHECK: define i32 @f3
; CHECK: @sprintf
; CHECK: }
%0 = tail call i32 (i8*, i8*, ...)* @sprintf(i8 *%p, i8* getelementptr ([4 x i8]* @.str, i32 0, i32 0), double %x)
ret i32 %0
}
declare i32 @printf(i8* nocapture, ...) nounwind
declare i32 @sprintf(i8* nocapture, i8* nocapture, ...) nounwind